Two new comets of interest C/2012 K5 (LINEAR) and C/2012 L2 (LINEAR) have been reported (okay, so K5's been around a little while but .. Transit of Venus!). Images of C/2012 K5 here and here and images of C/2012 L2 here.
C/2012 K5 will be come moderately bright, magnitude 10, in late December 2012-early January 2013. It will be well placed for observations with the northern iTelescopes as it moves from Ursa Major through to Taurus.
C/2012 L2 will become magnitude 11.7 in March 2013, passing from Aries to Taurus. But it will be very close to the horizon for the northern iTelescopes (and below the reach of the southern iTelescopes), so a bit of a challenge.
Updated orbital information for C/2012 K1 PANSTARRS still has it as magnitude 6 in October 2014, best seen with the southern iTelescopes, and passing through some beautiful territory.